ask :setelah instal blakmoon fetching attachment juga blom bisa

I'm writing an Android app that, among other things, uses the GData
libraries to upload videos shot with the camera to Youtube (code
below). However, I'm a bit confused about how to authenticate my
users.
Can I simply assume that they are already signed in to Youtube, since
they're using Android? Or do I need to ask them to authenticate? In
which case, should I use ClientLogin?
There seems to be little example code on how to use ClientLogin in
Android, and since it's using people's Google account passwords, it
obviously needs to be secure. I'm a bit concerned at the prospect of
writing my own authentication code without much guidance, and at the
extra step required from users.
It seems odd that I have to ask people to authenticate for a Google
service, given that they are using Google phones and the inbuilt
Google apps don't require external authentication. Why is this? It
seems to put my app at a disadvantage to Google's own apps.
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Here's the code that I have, below:
private void testGdata() {
YouTubeService service = new YouTubeService(clientId,
developerKey);
VideoEntry newEntry = new VideoEntry();
YouTubeMediaGroup mg = newEntry.getOrCreateMediaGroup();
mg.setTitle(new MediaTitle());
mg.getTitle().setPlainTextContent("Custom title here");
mg.addCategory(new
MediaCategory(YouTubeNamespace.CATEGORY_SCHEME,
"Politics"));
mg.setKeywords(new MediaKeywords());
mg.getKeywords().addKeyword("myImportantKeyword");
mg.setDescription(new MediaDescription());
mg.getDescription().setPlainTextContent("Custom description
here");
mg.setPrivate(false);
mg.addCategory(new
MediaCategory(YouTubeNamespace.DEVELOPER_TAG_SCHEME, "mydevtag"));
mg.addCategory(new
MediaCategory(YouTubeNamespace.DEVELOPER_TAG_SCHEME,
"anotherdevtag"));
newEntry.setGeoCoordinates(new GeoRssWhere(37.0,-122.0));
// alternatively, one could specify just a descriptive string
// newEntry.setLocation("Mountain View, CA");
//MediaFileSource ms = new MediaFileSource(new File("file.mov"),
"video/quicktime");
MediaFileSource ms = new MediaFileSource(video, "video/3gpp");
newEntry.setMediaSource(ms);
String uploadUrl =
"http://uploads.gdata.youtube.com/feeds/api/users/default/
uploads";
try {
VideoEntry createdEntry = service.insert(new
URL(uploadUrl),
newEntry);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ServiceException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
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